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Savory Potato and Leek Gratin

A creamy, cheesy potato and leek gratin baked until golden and tender—perfect comfort food side dish.
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Prep Time 25 minutes
Cook Time 1 hour 15 minutes
Total Time 1 hour 40 minutes
Servings: 6 servings
Course: Side Dish
Cuisine: American, French-Inspired
Calories: 320

Ingredients
  

Gratin Base
  • 2.5 lbs Yukon Gold potatoes thinly sliced
  • 3 leeks sliced
  • 3 tbsp unsalted butter
  • 2 cups heavy cream
  • 1 cup whole milk
  • 1.5 cups Gruyère cheese grated
  • 0.5 cup Parmesan cheese grated

Equipment

  • Baking dish
  • Saucepan
  • Skillet
  • Mandoline or knife

Method
 

  1. Preheat oven to 375°F (190°C) and grease a baking dish.
  2. Sauté leeks in butter until soft and fragrant.
  3. Warm cream and milk with seasoning.
  4. Layer potatoes, leeks, and cheese in the baking dish.
  5. Pour cream mixture over layers and top with Parmesan.
  6. Cover and bake 45 minutes, then uncover and bake until golden.
  7. Rest 10 minutes before serving.

Notes

Can be made ahead and reheated before serving.